The book "Linked Data: Legacy Data Discovery in the Semantic Web Era" offers a comprehensive analysis of the challenges and opportunities arising from the integration of legacy data into the modern Semantic Web environment. In an age where data is ubiquitous in a web-based context, the need to make this data machine-readable and visible is becoming increasingly important. The work explains the development of the Semantic Web and the role of Linked Data as a key technology for enhancing data availability and usability. It provides a detailed overview of the Linked Data technology stack, including the principles and use cases that illustrate the implementation of these technologies. Additionally, an approach to applying these principles to bibliographic data is presented, followed by a comparison of the techniques used with an automatic conversion tool.